On TV: Sunday 15th January 2012
Channel: BBC 1 9-10.30pm
Episode Type: The finale to the three part drama series
In 1 Sentence: Tantalising, thrilling and sharp: this is what Sherlock does best.
BBC Summary: Sherlock and John lock horns with their old enemy in one final problem that tests loyalty and courage to their very limits. Sherlock must fight for his reputation, his sanity and his life. But is he all he claims to be?


